A BRIEF HISTORY OF WINDMILLS IS GIVEN. VARIOUS MODELS ARE DESCRIBED, WITH DISCUSSIONS OF THEIR PROS AND CONS, ESPECIALLY IN REGARD TO NUMBER OF BLADES AND METHOD OF ORIENTATION TO THE WIND. SYSTEMS FOR TRANSMISSION OF POWER FROM THE WIND MOTOR TO A PUMP, GENERATOR, OR OTHER TYPE OF EQUIPMENT ARE DESCRIBED. A METHOD FOR COMPUTING THE TENSION AND COMPRESSION STRESSES ON THE WIND MOTOR PYLON IS GIVEN AND THE CONSTRUCTION OF PYLONS AND WATER TANKS IS DISCUSSED. FOUNDATION AND ANCHORING SYSTEMS ARE DESCRIBED, AS ARE SEVERAL METHODS FOR ASSEMBLING AND RAISING THE WIND MOTOR ON ITS PYLON. SYSTEMS USING WIND MOTORS TO DRAW AND ELEVATE WATER BY MEANS OF PUMPS AND SYSTEMS USING WIND MOTORS IN CONJUNCTION WITH GENERATORS, STORAGE BATTERIES, ETC., TO GENERATE ELECTRICITY ARE DESCRIBED. EFFICIENCY TABLES AND COMPARATIVE COST PRICE TABLES ARE PROVIDED FOR EACH OF THESE APPLICATIONS.

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